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drm/i915: Skip Bit12 fw domain reset for gen12+

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Bit12 of the Forcewake request register should not be cleared post
gen12. Do not touch this bit while clearing during fw domain reset.

v2: Tweak the comment to drop older platforms(MattR)

Bspec: 52542

Signed-off-by: Sushma Venkatesh Reddy <sushma.venkatesh.reddy@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220817224304.255767-1-radhakrishna.sripada@intel.com
This commit is contained in:
Radhakrishna Sripada
2022-08-17 15:43:04 -07:00
parent 95ccf312a1
commit 6509dd1111
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/i915/intel_uncore.c
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@@ -112,8 +112,11 @@ fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
* trying to reset here does exist at this point (engines could be fused
* off in ICL+), so no waiting for acks
*/
/* WaRsClearFWBitsAtReset:bdw,skl */
fw_clear(d, 0xffff);
/* WaRsClearFWBitsAtReset */
if (GRAPHICS_VER(d->uncore->i915) >= 12)
fw_clear(d, 0xefff);
else
fw_clear(d, 0xffff);
}
static inline void